chapter 23-24

Each of the following is a symptom of acute chemical toxicity except one. Which one is the EXCEPTION? a. Dizziness b. Nausea c. Headache d. Cancer

Cancer

The bacteria in the biofilm are more resistant to chemical germicides than planktonic bacteria by a factor of: a. 3. b. 100. c. 1500. d. 5.

1500

The protocol recommended by manufacturers of eyewash units to reduce microbial content in the waterline is a _____-minute flushing __________. a. 3; weekly b. 3; monthly c. 2; daily d. 6; weekly

3; weekly

The government agency responsible for enforcing rules regarding the disposal of regulated waste is the: a. EPA. b. CDC. c. FDA. d. OSHA

EPA

Which of the following techniques in dentistry has been shown to be a potential source of cross-contamination as a result of backflow into a patient's mouth? a. Hand scaling with periodontal curettes. b. Use of an ultrasonic or piezo scaler to clean accretions from teeth. c. Use of a high-speed handpiece for cavity preparation. d. Low-volume saliva ejectors.

Low-volume saliva ejectors.

Which of the following is true of Safety Data Sheets (SDS)? a. The SDS should be organized in binders so that employees can locate a particular SDS. b. They should be attached to each product that is associated with that particular SDS. c. The SDS should be retained for 5 years. d. They are supplied by the Occupational Safety and Health Administration (OSHA).

The SDS should be organized in binders so that employees can locate a particular SDS.

Which of the following statements is true about dental unit waterlines? a. Viruses cannot multiply in the DUWL. b. Flushing for 20 to 30 seconds after each patient will remove biofilms from the lines. c. The use of sterile water in the self-contained water reservoir ensures that water will be sterile at the point of delivery. d. Microfilters reduce the bacterial contamination of water and destroy the biofilms that colonize the DUWLs.

Viruses cannot multiply in the DUWL.

Which of the following types of water will likely have the highest bacterial colony-forming unit (CFU) count? a. Distilled water purchased in a plastic container. b. Tap water from the sink. c. Water from an air-water syringe. d. Water from a drinking fountain.

Water from an air-water syringe.

Reduction of exposure of the dental unit water for the dental team include all of the following except: a. masks. b. the HVE. c. a dental dam. d. protective eyewear and/or face shields.

a dental dam.

A victim who immediately feels the effects of a chemical spill, with symptoms of dizziness, headache, nausea, and vomiting, is experiencing: a. acute chemical toxicity. b. chemical resistance. c. chronic chemical toxicity. d. mild exposure.

acute chemical toxicity.

A chemical that can cause a physical or health hazard is: a. toxic. b. a hazardous chemical. c. corrosive. d. poisonous if swallowed.

b. a hazardous chemical.

Water from municipal lines can be harmful to a patient because it may contain a biofilm with: a. bacterial cells. b. fluoride. c. human immunodeficiency virus (HIV). d. chlorine.

bacterial cells.

Used radiographic fixer: a. is nonhazardous; however, used radiographic developer is hazardous. b. can be managed on site with the installation of a silver recovery system. c. should be flushed down the toilet. d. requires offsite treatment.

can be managed on site with the installation of a silver recovery system.

When choosing a chemical agent to give dental unit waterlines a "shock" treatment, care should be taken to: a. use the chemical agent no more than once a month. b. check with the manufacturer to determine the recommended chemical product and protocol for maintenance. c. replace all dental unit waterlines on a yearly basis. d. scrub out all the dental unit water lines with a fine-bristled brush

check with the manufacturer to determine the recommended chemical product and protocol for maintenance.

All of the following are true about handling extracted teeth except extracted teeth: a. containing amalgam restorations should be heat sterilized to prevent the release of mercury vapors. b. are considered potentially infectious. c. can be heat sterilized for educational purposes. d. are regulated waste.

containing amalgam restorations should be heat sterilized to prevent the release of mercury vapors.

All of the following information is required on a SDS except: a. accidental release measures. b. cost of product. c. composition/information on ingredients. d. hazard identification.

cost of product.

To reduce the microbial count temporarily and to help clean the handpiece waterlines, DUWLs should be flushed: a. For 20 to 30 seconds between patients but not at the beginning of the day. b. At the beginning of the day for several minutes but not between patients. c. only after the water has been allowed to become stagnant, such as over a weekend. d. at the beginning of the day for several minutes and for 20 to 30 seconds between patients.

d. at the beginning of the day for several minutes and for 20 to 30 seconds between patients.

The product that does not need to be listed on the chemical inventory is: a. composite. b. amalgam. c. dental film. d. phosphoric acid etch.

dental film.

The written program of the Hazard Communication Program must include all of the following information except: a. a description of staff training. b. the names of all employees who are exposed to hazardous chemicals. c. the identity the individual responsible for the program. d. employee phone numbers.

employee phone numbers.

Planktonic bacteria are: a. unable to survive in DUWLs. b. free floating in the water. c. in the biofilm attached to DUWL walls. d. prevented from entering DUWLs by use of antiretraction valves.

free floating in the water.

If a small mercury spill occurs in the dental office, the assistant should: a. call the HAZ-MAT team. b. make a report and tell the dentist. c. call the EPA. d. get the mercury spill kit, a mask, and utility gloves.

get the mercury spill kit, a mask, and utility gloves.

Advantages of using self-contained water reservoirs include: a. increasing the amount of biofilm in waterlines. b. the ability to sterilize that inside parts of the dental unit. c. complete elimination of biofilms and bacteria from dental waterlines. d. giving the dental office control over quality of water used.

giving the dental office control over quality of water used.

All of the following metals are considered toxic forms of waste except: a. gold. b. lead. c. barium. d. chromium.

gold

An example of regulated waste that requires special disposal is: a. food. b. human tissue. c. a used patient bib. d. saliva-soaked gauze.

human tissue.

Wastes are classified as hazardous if they are: a. plastic. b. ultrasonic. c. ingestible. d. ignitable.

ignitable

In addition to chemical exposure directly damaging the lungs, the organs that can also be affected are: a. heart, brain, and bladder. b. kidneys, brain, and liver. c. heart, brain, and thyroid gland. d. brain, heart, and stomach.

kidneys, brain, and liver.

Chronic chemical toxicity results from generally ______ levels of the chemical over a much _______ time period than acute chemical toxicity. a. higher; shorter b. lower; shorter c. higher; longer d. lower; longer

lower; longer

For continuing employees, Hazard Communication Program training is required: a. once a month. b. twice a year. c. once a year. d. only at the time of initial hiring.

once a year.

All of the following are considered a regulated waste except: a. blood-soaked gauze. b. saliva-soaked gauze. c. human tissue. d. scalpel blade.

saliva-soaked gauze.

Scrap dental amalgam should be collected and stored in a designated airtight container: a. under photographic developer solution. b. under photographic fixer solution. c. under water. d. that is dry.

that is dry.

Latex gloves worn during patient care do not provide adequate protection when handling chemicals because: a. they have many pinholes that are responsible for leaks. b. they will chemically react and create toxic fumes. c. the latex in the gloves degrades when exposed to chemical disinfectants. d. they are likely to tear.

the latex in the gloves degrades when exposed to chemical disinfectants.

An option for independent verification of the quality of dental unit water cleaning is: a. using a commercial testing service. b. none; there is no availability for testing of the dental waterline cleaning. c. using an in-office test kit. d. checking to see if any patients become ill following dental treatment.

using a commercial testing service.

Factors contributing to the formation of bacteria in DUWLs include all of the following except: a. water heating. b. backflow from a saliva ejector. c. stagnant water. d. well water.

well water.

Training regarding the dental office hazard communication program is required for continuing employees every: a. 3 years. b. 6 months. c. month. d. year.

year.

Methods of reducing the level of bacterial contamination in waterlines include all of the following except: a. self-contained water reservoirs. b. yearly replacement of all waterlines. c. microfiltration. d. chemical treatment regimens.

yearly replacement of all waterlines.